[apple/libc.git] / compat-43 / sigcompat.c

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#if __DARWIN_UNIX03
#ifdef VARIANT_CANCELABLE
#include <pthread.h>
#endif /* VARIANT_CANCELABLE */
extern int __unix_conforming;
#endif /* __DARWIN_UNIX03 */

#include <sys/param.h>
#include <signal.h>
#include <errno.h>

#ifndef BUILDING_VARIANT
#if defined(__DYNAMIC__)
extern int _sigaction_nobind (int sig, const struct sigaction *nsv, struct sigaction *osv);
extern int _sigvec_nobind (int, struct sigvec *, struct sigvec *);
#endif

static int
sigvec__(int signo,
	 struct sigvec *sv,
	 struct sigvec *osv,
	 int bind)
{
	int ret;

	if (sv)
		sv->sv_flags ^= SV_INTERRUPT;	/* !SA_INTERRUPT */
#if defined(__DYNAMIC__)
        if (bind) {
#endif
            ret = sigaction(signo, (struct sigaction *)sv, (struct sigaction *)osv);
#if defined(__DYNAMIC__)
	} else {
            ret = _sigaction_nobind(signo, (struct sigaction *)sv, (struct sigaction *)osv);
        }
#endif
        if (ret == 0 && osv)
		osv->sv_flags ^= SV_INTERRUPT;	/* !SA_INTERRUPT */
	return (ret);
}

int
sigvec(int signo,
       struct sigvec *sv,
       struct sigvec *osv)
{
    return sigvec__(signo, sv, osv, 1);
}

#if defined(__DYNAMIC__)
int
_sigvec_nobind(int signo,
	       struct sigvec *sv,
	       struct sigvec *osv)
{
    return sigvec__(signo, sv, osv, 0);
}
#endif

int
sigsetmask(int mask)
{
	int omask, n;

	n = sigprocmask(SIG_SETMASK, (sigset_t *) &mask, (sigset_t *) &omask);
	if (n)
		return (n);
	return (omask);
}

int
sigblock(int mask)
{
	int omask, n;

	n = sigprocmask(SIG_BLOCK, (sigset_t *) &mask, (sigset_t *) &omask);
	if (n)
		return (n);
	return (omask);
}
#endif /* !BUILDING_VARIANT */

#if __DARWIN_UNIX03
int
sigpause(int sig)
{
	sigset_t mask;

	if (__unix_conforming == 0)
		__unix_conforming = 1;
#ifdef VARIANT_CANCELABLE
	pthread_testcancel();
#endif /* VARIANT_CANCELABLE */

	if ((sig <= 0) || (sig >= NSIG)) {
		errno = EINVAL;
		return(-1);
	}
	if (sigprocmask(SIG_BLOCK, (sigset_t *) 0, (sigset_t *) &mask) < 0) {
		return(-1);
	}
	sigdelset(&mask, sig);
	return (sigsuspend(&mask));
}
#else
int
sigpause(int mask)
{
	return (sigsuspend((sigset_t *)&mask));
}
#endif /* __DARWIN_UNIX03 */

#ifndef BUILDING_VARIANT
int
sighold(int sig)
{
	sigset_t mask;

	if ((sig <= 0) || (sig >= NSIG)) {
		errno = EINVAL;
		return(-1);
	}
	sigemptyset(&mask);
	sigaddset(&mask, sig);
	return(sigprocmask(SIG_BLOCK, &mask,(sigset_t *)0));
}

int
sigrelse(int sig)
{
	sigset_t mask;

	if ((sig <= 0) || (sig >= NSIG)) {
		errno = EINVAL;
		return(-1);
	}
	sigemptyset(&mask);
	sigaddset(&mask, sig);
	return(sigprocmask(SIG_UNBLOCK, &mask,(sigset_t *)0));
}


int
sigignore(int sig)
{
	return (signal(sig, SIG_IGN) == SIG_ERR ? -1 : 0);
}

void (*sigset(int sig, void (*disp)(int)))(int) {
	sigset_t omask;
	int blocked;
	struct sigaction oact;

	if ((sig <= 0) || (sig >= NSIG)) {
		errno = EINVAL;
		return (SIG_ERR);
	}
	if (-1 == sigprocmask(0, NULL, &omask))
		return (SIG_ERR);
	blocked = sigismember(&omask, sig);
	if (disp == SIG_HOLD) {
		if (blocked)
			return (SIG_HOLD);
		if ((-1 == sigaction(sig, NULL, &oact)) ||
		    (-1 == sighold(sig)))
			return (SIG_ERR);
		return (sig_t)oact.sa_handler;
	} else {
		if (blocked) {
			if (-1 == sigrelse(sig))
				return (SIG_ERR);
		}
		sig_t rv = signal(sig, disp);
		if (rv != SIG_ERR)
			return blocked ? SIG_HOLD : rv;
		else
			return (rv);
	}
}
#endif /* !BUILDING_VARIANT */
Commit	Line	Data
e9ce8d39 A	1	/*
	2	* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
734aad71 A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. Please obtain a copy of the License at
	10	* http://www.opensource.apple.com/apsl/ and read it before using this
	11	* file.
	12	*
	13	* The Original Code and all software distributed under the License are
	14	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
e9ce8d39 A	15	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
e9ce8d39 A	16	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
734aad71 A	17	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	18	* Please see the License for the specific language governing rights and
	19	* limitations under the License.
e9ce8d39 A	20	*
	21	* @APPLE_LICENSE_HEADER_END@
	22	*/
	23	/*
	24	* Copyright (c) 1989, 1993
	25	* The Regents of the University of California. All rights reserved.
	26	*
	27	* Redistribution and use in source and binary forms, with or without
	28	* modification, are permitted provided that the following conditions
	29	* are met:
	30	* 1. Redistributions of source code must retain the above copyright
	31	* notice, this list of conditions and the following disclaimer.
	32	* 2. Redistributions in binary form must reproduce the above copyright
	33	* notice, this list of conditions and the following disclaimer in the
	34	* documentation and/or other materials provided with the distribution.
	35	* 3. All advertising materials mentioning features or use of this software
	36	* must display the following acknowledgement:
	37	* This product includes software developed by the University of
	38	* California, Berkeley and its contributors.
	39	* 4. Neither the name of the University nor the names of its contributors
	40	* may be used to endorse or promote products derived from this software
	41	* without specific prior written permission.
	42	*
	43	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	44	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	45	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	46	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	47	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	48	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	49	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	50	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	51	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	52	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	53	* SUCH DAMAGE.
	54	*/
	55
224c7076 A	56	#if __DARWIN_UNIX03
	57	#ifdef VARIANT_CANCELABLE
	58	#include <pthread.h>
224c7076 A	59	#endif /* VARIANT_CANCELABLE */
	60	extern int __unix_conforming;
	61	#endif /* __DARWIN_UNIX03 */
e9ce8d39 A	62
	63	#include <sys/param.h>
	64	#include <signal.h>
5b2abdfb	65	#include <errno.h>
224c7076 A	66
224c7076 A	67	#ifndef BUILDING_VARIANT
9385eb3d A	68	#if defined(__DYNAMIC__)
9385eb3d A	69	extern int _sigaction_nobind (int sig, const struct sigaction nsv, struct sigaction osv);
6465356a	70	extern int _sigvec_nobind (int, struct sigvec , struct sigvec );
9385eb3d	71	#endif
e9ce8d39	72
59e0d9fe	73	static int
6465356a A	74	sigvec__(int signo,
	75	struct sigvec *sv,
	76	struct sigvec *osv,
	77	int bind)
e9ce8d39 A	78	{
	79	int ret;
	80
	81	if (sv)
	82	sv->sv_flags ^= SV_INTERRUPT; /* !SA_INTERRUPT */
	83	#if defined(__DYNAMIC__)
	84	if (bind) {
	85	#endif
	86	ret = sigaction(signo, (struct sigaction )sv, (struct sigaction )osv);
	87	#if defined(__DYNAMIC__)
	88	} else {
	89	ret = _sigaction_nobind(signo, (struct sigaction )sv, (struct sigaction )osv);
	90	}
	91	#endif
	92	if (ret == 0 && osv)
	93	osv->sv_flags ^= SV_INTERRUPT; /* !SA_INTERRUPT */
	94	return (ret);
	95	}
	96
59e0d9fe	97	int
6465356a A	98	sigvec(int signo,
	99	struct sigvec *sv,
	100	struct sigvec *osv)
e9ce8d39 A	101	{
	102	return sigvec__(signo, sv, osv, 1);
	103	}
	104
	105	#if defined(__DYNAMIC__)
59e0d9fe	106	int
6465356a A	107	_sigvec_nobind(int signo,
	108	struct sigvec *sv,
	109	struct sigvec *osv)
e9ce8d39 A	110	{
	111	return sigvec__(signo, sv, osv, 0);
	112	}
	113	#endif
	114
59e0d9fe	115	int
6465356a	116	sigsetmask(int mask)
e9ce8d39 A	117	{
	118	int omask, n;
	119
	120	n = sigprocmask(SIG_SETMASK, (sigset_t ) &mask, (sigset_t ) &omask);
	121	if (n)
	122	return (n);
	123	return (omask);
	124	}
	125
59e0d9fe	126	int
6465356a	127	sigblock(int mask)
e9ce8d39 A	128	{
	129	int omask, n;
	130
	131	n = sigprocmask(SIG_BLOCK, (sigset_t ) &mask, (sigset_t ) &omask);
	132	if (n)
	133	return (n);
	134	return (omask);
	135	}
224c7076 A	136	#endif /* !BUILDING_VARIANT */
	137
	138	#if __DARWIN_UNIX03
	139	int
6465356a	140	sigpause(int sig)
224c7076 A	141	{
	142	sigset_t mask;
	143
	144	if (__unix_conforming == 0)
	145	__unix_conforming = 1;
	146	#ifdef VARIANT_CANCELABLE
6465356a	147	pthread_testcancel();
224c7076	148	#endif /* VARIANT_CANCELABLE */
e9ce8d39	149
224c7076 A	150	if ((sig <= 0) \|\| (sig >= NSIG)) {
	151	errno = EINVAL;
	152	return(-1);
	153	}
	154	if (sigprocmask(SIG_BLOCK, (sigset_t ) 0, (sigset_t ) &mask) < 0) {
	155	return(-1);
	156	}
	157	sigdelset(&mask, sig);
	158	return (sigsuspend(&mask));
	159	}
	160	#else
59e0d9fe	161	int
6465356a	162	sigpause(int mask)
e9ce8d39 A	163	{
	164	return (sigsuspend((sigset_t *)&mask));
	165	}
224c7076	166	#endif /* __DARWIN_UNIX03 */
5b2abdfb	167
224c7076	168	#ifndef BUILDING_VARIANT
59e0d9fe	169	int
6465356a	170	sighold(int sig)
5b2abdfb A	171	{
	172	sigset_t mask;
	173
3d9156a7 A	174	if ((sig <= 0) \|\| (sig >= NSIG)) {
	175	errno = EINVAL;
	176	return(-1);
	177	}
5b2abdfb A	178	sigemptyset(&mask);
	179	sigaddset(&mask, sig);
	180	return(sigprocmask(SIG_BLOCK, &mask,(sigset_t *)0));
	181	}
59e0d9fe A	182
59e0d9fe A	183	int
6465356a	184	sigrelse(int sig)
5b2abdfb A	185	{
	186	sigset_t mask;
	187
3d9156a7 A	188	if ((sig <= 0) \|\| (sig >= NSIG)) {
	189	errno = EINVAL;
	190	return(-1);
	191	}
5b2abdfb A	192	sigemptyset(&mask);
	193	sigaddset(&mask, sig);
	194	return(sigprocmask(SIG_UNBLOCK, &mask,(sigset_t *)0));
	195	}
	196
59e0d9fe A	197
59e0d9fe A	198	int
6465356a	199	sigignore(int sig)
59e0d9fe A	200	{
	201	return (signal(sig, SIG_IGN) == SIG_ERR ? -1 : 0);
	202	}
	203
3d9156a7 A	204	void (sigset(int sig, void (disp)(int)))(int) {
	205	sigset_t omask;
	206	int blocked;
	207	struct sigaction oact;
	208
	209	if ((sig <= 0) \|\| (sig >= NSIG)) {
	210	errno = EINVAL;
	211	return (SIG_ERR);
	212	}
	213	if (-1 == sigprocmask(0, NULL, &omask))
	214	return (SIG_ERR);
	215	blocked = sigismember(&omask, sig);
	216	if (disp == SIG_HOLD) {
	217	if (blocked)
	218	return (SIG_HOLD);
	219	if ((-1 == sigaction(sig, NULL, &oact)) \|\|
	220	(-1 == sighold(sig)))
	221	return (SIG_ERR);
	222	return (sig_t)oact.sa_handler;
	223	} else {
	224	if (blocked) {
	225	if (-1 == sigrelse(sig))
	226	return (SIG_ERR);
	227	}
	228	sig_t rv = signal(sig, disp);
	229	if (rv != SIG_ERR)
	230	return blocked ? SIG_HOLD : rv;
	231	else
	232	return (rv);
	233	}
	234	}
224c7076	235	#endif /* !BUILDING_VARIANT */